Calibre conversion status is forever 1%

Hi - I followed the readme instructions, added the latest DeDRM plugin release to Calibre and tried to convert a book i bought on google play (loaded to ADE already) to PDF. However after 30 minutes it's still showing only 1% progress. Here's the job details:

Convert book 1 of 1 (命數) DeDRM v7.2.1: Trying to decrypt a0jxdl6m.pdf DeDRM v7.2.1: a0jxdl6m.pdf is a PDF ebook DeDRM v7.2.1: Trying Encryption key default_key DeDRM v7.2.1: Exception when decrypting after 0.0 seconds Traceback (most recent call last): File "calibre_plugins.dedrm.init", line 436, in PDFDecrypt result = ineptpdf.decryptBook(userkey, path_to_ebook, of.name) File "calibre_plugins.dedrm.ineptpdf", line 2178, in decryptBook serializer = PDFSerializer(inf, userkey) File "calibre_plugins.dedrm.ineptpdf", line 1984, in init doc.initialize(userkey) File "calibre_plugins.dedrm.ineptpdf", line 1460, in initialize raise PDFEncryptionError('Document is not encrypted.') calibre_plugins.dedrm.ineptpdf.PDFEncryptionError: Document is not encrypted. DeDRM v7.2.1: Failed to decrypt with key default_key after 0.0 seconds DeDRM v7.2.1: Looking for new default Adobe Digital Editions Keys after 0.0 seconds DeDRM v7.2.1: Trying a new default key DeDRM v7.2.1: Exception when decrypting after 0.1 seconds Traceback (most recent call last): File "calibre_plugins.dedrm.init", line 487, in PDFDecrypt result = ineptpdf.decryptBook(userkey, path_to_ebook, of.name) File "calibre_plugins.dedrm.ineptpdf", line 2178, in decryptBook serializer = PDFSerializer(inf, userkey) File "calibre_plugins.dedrm.ineptpdf", line 1984, in init doc.initialize(userkey) File "calibre_plugins.dedrm.ineptpdf", line 1460, in initialize raise PDFEncryptionError('Document is not encrypted.') calibre_plugins.dedrm.ineptpdf.PDFEncryptionError: Document is not encrypted. DeDRM v7.2.1: Failed to decrypt with new default key after 0.1 seconds DeDRM v7.2.1: Ultimately failed to decrypt after 0.1 seconds. Read the FAQs at Harper's repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md Conversion options changed from defaults: read_metadata_from_opf: '/var/folders/ql/nxd5ws3d78j4h_njjc3bmryc0000gp/C/calibre_5.32.0_tmp_ejyrrztl/dcxlabzh.opf' verbose: 2 cover: '/var/folders/ql/nxd5ws3d78j4h_njjc3bmryc0000gp/C/calibre_5.32.0_tmp_ejyrrztl/v4b0ys0i.jpeg' output_profile: 'kindle' Resolved conversion options calibre version: 5.32.0 {'asciiize': False, 'author_sort': None, 'authors': None, 'base_font_size': 0.0, 'book_producer': None, 'change_justification': 'original', 'chapter': "//[((name()='h1' or name()='h2') and re:test(., " "'\s((chapter|book|section|part)\s+)|((prolog|prologue|epilogue)(\s+|$))', " "'i')) or @class = 'chapter']", 'chapter_mark': 'pagebreak', 'comments': None, 'cover': '/var/folders/ql/nxd5ws3d78j4h_njjc3bmryc0000gp/C/calibre_5.32.0_tmp_ejyrrztl/v4b0ys0i.jpeg', 'custom_size': None, 'debug_pipeline': None, 'dehyphenate': True, 'delete_blank_paragraphs': True, 'disable_font_rescaling': False, 'duplicate_links_in_toc': False, 'embed_all_fonts': False, 'embed_font_family': None, 'enable_heuristics': False, 'expand_css': False, 'extra_css': None, 'filter_css': '', 'fix_indents': True, 'font_size_mapping': None, 'format_scene_breaks': True, 'html_unwrap_factor': 0.4, 'input_encoding': None, 'input_profile': <calibre.customize.profiles.InputProfile object at 0x10bd1b280>, 'insert_blank_line': False, 'insert_blank_line_size': 0.5, 'insert_metadata': False, 'isbn': None, 'italicize_common_cases': True, 'keep_ligatures': False, 'language': None, 'level1_toc': None, 'level2_toc': None, 'level3_toc': None, 'line_height': 0.0, 'linearize_tables': False, 'margin_bottom': 5.0, 'margin_left': 5.0, 'margin_right': 5.0, 'margin_top': 5.0, 'markup_chapter_headings': True, 'max_toc_links': 50, 'minimum_line_height': 120.0, 'new_pdf_engine': False, 'no_chapters_in_toc': False, 'no_images': False, 'no_inline_navbars': False, 'output_profile': <calibre.customize.profiles.KindleOutput object at 0x10bd1b790>, 'page_breaks_before': "//*[name()='h1' or name()='h2']", 'paper_size': 'letter', 'pdf_add_toc': False, 'pdf_default_font_size': 20, 'pdf_footer_template': None, 'pdf_header_template': None, 'pdf_hyphenate': False, 'pdf_mark_links': False, 'pdf_mono_family': 'Courier', 'pdf_mono_font_size': 16, 'pdf_odd_even_offset': 0.0, 'pdf_page_margin_bottom': 72.0, 'pdf_page_margin_left': 72.0, 'pdf_page_margin_right': 72.0, 'pdf_page_margin_top': 72.0, 'pdf_page_number_map': None, 'pdf_page_numbers': False, 'pdf_sans_family': 'Helvetica', 'pdf_serif_family': 'Times', 'pdf_standard_font': 'serif', 'pdf_use_document_margins': False, 'prefer_metadata_cover': False, 'preserve_cover_aspect_ratio': False, 'pretty_print': False, 'pubdate': None, 'publisher': None, 'rating': None, 'read_metadata_from_opf': '/var/folders/ql/nxd5ws3d78j4h_njjc3bmryc0000gp/C/calibre_5.32.0_tmp_ejyrrztl/dcxlabzh.opf', 'remove_fake_margins': True, 'remove_first_image': False, 'remove_paragraph_spacing': False, 'remove_paragraph_spacing_indent_size': 1.5, 'renumber_headings': True, 'replace_scene_breaks': '', 'search_replace': '[]', 'series': None, 'series_index': None, 'smarten_punctuation': False, 'sr1_replace': None, 'sr1_search': None, 'sr2_replace': None, 'sr2_search': None, 'sr3_replace': None, 'sr3_search': None, 'start_reading_at': None, 'subset_embedded_fonts': False, 'tags': None, 'timestamp': None, 'title': None, 'title_sort': None, 'toc_filter': None, 'toc_threshold': 6, 'toc_title': None, 'transform_css_rules': '[]', 'transform_html_rules': '[]', 'uncompressed_pdf': False, 'unit': 'inch', 'unsmarten_punctuation': False, 'unwrap_factor': 0.45, 'unwrap_lines': True, 'use_auto_toc': False, 'use_profile_size': False, 'verbose': 2} Running file type plugin DeDRM failed with traceback: Traceback (most recent call last): File "calibre/customize/ui.py", line 175, in _run_filetype_plugins File "calibre_plugins.dedrm.init", line 640, in run decrypted_ebook = self.PDFDecrypt(path_to_ebook) File "calibre_plugins.dedrm.init", line 515, in PDFDecrypt raise DeDRMError("{0} v{1}: Ultimately failed to decrypt after {2:.1f} seconds. Read the FAQs at Harper's repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md".format(PLUGIN_NAME, PLUGIN_VERSION, time.time()-self.starttime)) calibre_plugins.dedrm.DeDRMError: DeDRM v7.2.1: Ultimately failed to decrypt after 0.1 seconds. Read the FAQs at Harper's repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md DeDRM v7.2.1: Trying to decrypt a0jxdl6m.pdf DeDRM v7.2.1: a0jxdl6m.pdf is a PDF ebook DeDRM v7.2.1: Trying Encryption key default_key DeDRM v7.2.1: Exception when decrypting after 0.0 seconds Traceback (most recent call last): File "calibre_plugins.dedrm.init", line 436, in PDFDecrypt result = ineptpdf.decryptBook(userkey, path_to_ebook, of.name) File "calibre_plugins.dedrm.ineptpdf", line 2178, in decryptBook serializer = PDFSerializer(inf, userkey) File "calibre_plugins.dedrm.ineptpdf", line 1984, in init doc.initialize(userkey) File "calibre_plugins.dedrm.ineptpdf", line 1460, in initialize raise PDFEncryptionError('Document is not encrypted.') calibre_plugins.dedrm.ineptpdf.PDFEncryptionError: Document is not encrypted. DeDRM v7.2.1: Failed to decrypt with key default_key after 0.0 seconds DeDRM v7.2.1: Looking for new default Adobe Digital Editions Keys after 0.0 seconds DeDRM v7.2.1: Trying a new default key DeDRM v7.2.1: Exception when decrypting after 0.0 seconds Traceback (most recent call last): File "calibre_plugins.dedrm.init", line 487, in PDFDecrypt result = ineptpdf.decryptBook(userkey, path_to_ebook, of.name) File "calibre_plugins.dedrm.ineptpdf", line 2178, in decryptBook serializer = PDFSerializer(inf, userkey) File "calibre_plugins.dedrm.ineptpdf", line 1984, in init doc.initialize(userkey) File "calibre_plugins.dedrm.ineptpdf", line 1460, in initialize raise PDFEncryptionError('Document is not encrypted.') calibre_plugins.dedrm.ineptpdf.PDFEncryptionError: Document is not encrypted. DeDRM v7.2.1: Failed to decrypt with new default key after 0.0 seconds DeDRM v7.2.1: Ultimately failed to decrypt after 0.0 seconds. Read the FAQs at Harper's repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md Running file type plugin DeDRM failed with traceback: Traceback (most recent call last): File "calibre/customize/ui.py", line 175, in _run_filetype_plugins File "calibre_plugins.dedrm.init", line 640, in run decrypted_ebook = self.PDFDecrypt(path_to_ebook) File "calibre_plugins.dedrm.init", line 515, in PDFDecrypt raise DeDRMError("{0} v{1}: Ultimately failed to decrypt after {2:.1f} seconds. Read the FAQs at Harper's repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md".format(PLUGIN_NAME, PLUGIN_VERSION, time.time()-self.starttime)) calibre_plugins.dedrm.DeDRMError: DeDRM v7.2.1: Ultimately failed to decrypt after 0.0 seconds. Read the FAQs at Harper's repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md InputFormatPlugin: PDF Input running on /var/folders/ql/nxd5ws3d78j4h_njjc3bmryc0000gp/C/calibre_5.32.0_tmp_ejyrrztl/a0jxdl6m.pdf Converting file to html...

Could you advise what the problem is please? Your help is highly appreciated! Thanks in advance!

Max