Stopped saving changes to the settings

I just tried to save the settings in one of the boiler plate fields (of the before and of the after text), and it didn't save.

```
WordPress Version: 5.5.9
PHP Version: 7.4.28
MySQL Version: 5.7.37-log
[FeedWordPress](http://feedwordpress.radgeek.com/) (2022.0222)
```

Any suggestion on how to solve it?