update: still not fixed. I mean yeah, I did say it was solved, but it was because I fixed it myself since I'm a programmer myself. There is no actual update yet. This is a huge issue since I can't use it at all. RIght now it's been 3 days. Imagine paying for 6 months subscription since you love it so much, yet that exact upgrades prevents you from using the app anymore.

Nope. I've submitted a ticket immediately when that happened. It's been 3 days. No response yet. Do you see same error, too? UpgradeNagger?

Ohh yeahh, that's exactly the same. I assume this also happened shortly after you upgraded from the free plan?

Ohh I see. I think there might be some changes in the source code that breaks them. I'm in the middle of tracking down the root cause and I think I'm very close. Are you in an Edu plan or maybe other non-standard plan?

Ahh… I see. I think I've pretty much confirmed the issue here. Basically, there's this function called UpgradeNagger that does exactly what it sounds like: it nags the user to upgrade. But first, it checks the user's current plan and matches it against a list of predetermined plans. The problem is, this "list" doesn't include the Edu plan, which causes the match to fail and results in an error.

Below is the screenshot of the exact source code causing this.

I've developed my own fix to address this and it worked. It's quite simple, but it requires a little bit of coding knowledge. You just need to disable the UpgradeNagger function entirely.

If MindMeister hasn't fixed this by the end of the day, I might publish a tutorial to apply the fix on the community forum.