rautamiekka 
- Windows 10 21H1 Enterprise x64
- Google Chrome `95.0.4638.69 (Official Build) (64-bit)`.
- [Tampermonkey](https://chrome.google.com/webstore/detail/tampermonkey/dhdgffkkebhmkfjojejmpbldmpobfkfo) 4.13
- Script version `1.1.1` from the [primary install link](https://github.com/marktaiwan/Philomena-Bulk-Tag-Editor/raw/master/tag-editor.user.js) in the OP.
Doesn't seem to work properly for me:
On [the search page](/search?q=artist%3Aheretichesh%2Coc%2C-oc+name+needed%2C-oc%3A*) with the `Everything` filter enabled, I click 'Tag Editor' in top right corner, add "`oc name needed`" to the 'Tags to add' and click 'Apply'. It immediately says 'Completed' below the 'Tags to add' box, and redoing the search after 5mins and clicking any of the results shows the change wasn't made.
I honestly dunno how to help, as I found no useful logs under `C:\Users\REDACTED\AppData\Local\Google\Chrome\User Data\` even after enabling 'Collect errors' for Tampermonkey in [Chrome extension settings](chrome://extensions/?id=dhdgffkkebhmkfjojejmpbldmpobfkfo) and setting Tampermonkey's own logging as `Debug` in [its settings](chrome-extension://dhdgffkkebhmkfjojejmpbldmpobfkfo/options.html#nav=settings), which ain't helped by Tampermonkey's own docs being 1 of the most useless I've seen, if I didn't miss anything.
[Here's the screenshot with the debug console open](https://imgur.com/a/6A1kMkq), though.
- Google Chrome `95.0.4638.69 (Official Build) (64-bit)`.
- [Tampermonkey](https://chrome.google.com/webstore/detail/tampermonkey/dhdgffkkebhmkfjojejmpbldmpobfkfo) 4.13
- Script version `1.1.1` from the [primary install link](https://github.com/marktaiwan/Philomena-Bulk-Tag-Editor/raw/master/tag-editor.user.js) in the OP.
Doesn't seem to work properly for me:
On [the search page](/search?q=artist%3Aheretichesh%2Coc%2C-oc+name+needed%2C-oc%3A*) with the `Everything` filter enabled, I click 'Tag Edit
I honestly dunno how to help, as I found no useful logs under `C:\Users\REDACTED\AppData\Local\Google\Chrome\User Data\` even after enabling 'Collect errors' for Tampermonkey in [Chrome extension settings](chrome://extensions/?id=dhdgffkkebhmkfjojejmpbldmpobfkfo) and setting Tampermonkey's own logging as `Debug` in [its settings](chrome-extension://dhdgffkkebhmkfjojejmpbldmpobfkfo/options.html#nav=settings), which ain't helped by Tampermonkey's own docs being 1 of the most useless I've seen, if I didn't miss anything.
[Here's the screenshot with the debug console open](https://imgur.com/a/6A1kMkq), though.