Extension broken?

I'm on Firefox, using old reddit and a Pushshift API key. For the past couple of weeks (I think) I can't restore deleted comments or posts. This is what I see when I click "Show original" or "Show author" on a post:
```
[unedit-for-reddit] [INFO] Fetching from https://api.pushshift.io/reddit/search/submission/?ids=w4cxey&fields=selftext,author,id,created_utc,permalink [Unedit-and-Undelete-for-Reddit.user.js:122:19](moz-extension://d411a96a-f7dc-4512-aaf4-50fbf90accad/userscripts/Unedit-and-Undelete-for-Reddit.user.js?id=b461c651-0793-4411-9c90-a5818485e2c2)
Client Error: "InternalError: too much recursion" thrown at L646:14 in eval Message: "InternalError: too much recursion"
Object { tag: "unknown" }
[reddit-init.en.14qVkXaRvtU.js:6:1968](https://www.redditstatic.com/reddit-init.en.14qVkXaRvtU.js)
Uncaught InternalError: too much recursion
inlineFetch moz-extension://d411a96a-f7dc-4512-aaf4-50fbf90accad/userscripts/Unedit-and-Undelete-for-Reddit.user.js?id=b461c651-0793-4411-9c90-a5818485e2c2:646
onclick https://www.reddit.com/r/interestingasfuck/comments/w4cxey/deleted_by_user/:1
inlineFetch moz-extension://d411a96a-f7dc-4512-aaf4-50fbf90accad/userscripts/Unedit-and-Undelete-for-Reddit.user.js?id=b461c651-0793-4411-9c90-a5818485e2c2:646
onclick https://www.reddit.com/r/interestingasfuck/comments/w4cxey/deleted_by_user/:1
inlineFetch moz-extension://d411a96a-f7dc-4512-aaf4-50fbf90accad/userscripts/Unedit-and-Undelete-for-Reddit.user.js?id=b461c651-0793-4411-9c90-a5818485e2c2:646
onclick https://www.reddit.com/r/interestingasfuck/comments/w4cxey/deleted_by_user/:1
inlineFetch moz-extension://d411a96a-f7dc-4512-aaf4-50fbf90accad/userscripts/Unedit-and-Undelete-for-Reddit.user.js?id=b461c651-0793-4411-9c90-a5818485e2c2:646
[eval:646:14](chrome://devtools/content/webconsole/eval)
Uncaught Error: regexp too big
st https://www.redditstatic.com/reddit-init.en.14qVkXaRvtU.js:1
find https://www.redditstatic.com/reddit-init.en.14qVkXaRvtU.js:2
init https://www.redditstatic.com/reddit-init.en.14qVkXaRvtU.js:2
jQuery https://www.redditstatic.com/reddit-init.en.14qVkXaRvtU.js:1
close_menus https://www.redditstatic.com/reddit-init.en.14qVkXaRvtU.js:9
dispatch https://www.redditstatic.com/reddit-init.en.14qVkXaRvtU.js:2
handle https://www.redditstatic.com/reddit-init.en.14qVkXaRvtU.js:2
inlineFetch moz-extension://d411a96a-f7dc-4512-aaf4-50fbf90accad/userscripts/Unedit-and-Undelete-for-Reddit.user.js?id=b461c651-0793-4411-9c90-a5818485e2c2:646
onclick https://www.reddit.com/r/interestingasfuck/comments/w4cxey/deleted_by_user/:1
inlineFetch moz-extension://d411a96a-f7dc-4512-aaf4-50fbf90accad/userscripts/Unedit-and-Undelete-for-Reddit.user.js?id=b461c651-0793-4411-9c90-a5818485e2c2:646
```

I tried with both the userscript and the extension, same result.