Hi Derek,
Thanks for reaching out to us!
It’s possible there’s a conflict somewhere. Could you try to deactivate all other plugins before trying to create a new venue, to see if that makes a difference? Could you also switch to the default theme, and try again? Please read our documentation about Testing for conflicts before doing anything.
And could you please enable WP_DEBUG (https://codex.wordpress.org/Debugging_in_WordPress) and WP_DEBUG_LOG (https://codex.wordpress.org/Debugging_in_WordPress#WP_DEBUG_LOG) ? This will create a debug.log file inside the /wp-content directory.
After that, try reproducing the issue a few times, so that in case there is an error, it will be saved into the debug.log file. Please share that log file with us so we can see if any problem from there.
Please let me know what you find out during the process.
Cheers,
Jeremy