I haven’t been able to add to the list of stores for a few days. I also cannot change the information of existing stores. Anybody else have this problem? No update for a long time. What could be causing the problem?
Thanks for the details, looking at the logs, your database may have reached it’s limit, try to open a ticket to get your hosting provider assistance (increase server quota, etc), then deactivate and reactivate the plugin at admin Plugins page before trying to add a new store for testing.
It’s also recommended to update the plugin and all add-ons to the latest version, more info available in this knowledge base article here.