options: _ is not an object or null

_ is not an object or null
  buildDrive@moz-extension://321b1850-9fb5-4a37-8249-f08d5f78c6ed/js/vendors-node_modules_pnpm_db-to-cloud_0_8_1_node_modules_db-to-cloud_lib_db-to-cloud_js-node_-88f1ba.js:96:30
  use@moz-extension://321b1850-9fb5-4a37-8249-f08d5f78c6ed/js/vendors-node_modules_pnpm_db-to-cloud_0_8_1_node_modules_db-to-cloud_lib_db-to-cloud_js-node_-88f1ba.js:149:21
  doStart@moz-extension://321b1850-9fb5-4a37-8249-f08d5f78c6ed/js/background.js:2173:16

• UA: (Windows NT 10.0; Win64; x64; rv:153.0) Firefox/153.0
• Stylus: 2.4.9 (MV2)

This came up when I tried to configure Stylus to sync to webdav at mailbox.org

I also have a problem with dropbox. It worked for many months but now Connect comes up JSON.parse: unexpected end of data at line 1 column 1 of the JSON data. Sadly it doesn't say which file. Sometimes it comes up with a message about a missing token but I can't find anywhere (in stylus or in dropbox) to add a token