Hi there,
I can’t replicate that error at all, so this is most likely a unique combination with another plugin. I’d suggest using the Health Check plugin to troubleshoot that. It will allow you to deactivate all plugins and put your site on a default theme ONLY for yourself — your live visitors will not see that. We have a write-up on that here:
https://givewp.com/documentation/resources/troubleshoot-wordpress-websites-health-check/
Then you can enable plugins one at a time and test again until you see the problem again. Then let me know which plugin caused the conflict and I can take a closer look at replicating the issue for you.
Thanks!