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I keep getting this error message whenever I try to open the client: "Error: Could not find or load main class mage.client.MageFrame"

I also keep trying to update and it gets about halfway done then suddenly stops and pops up a window saying "A newer version of XMage is available"

Any help would be greatly appreciated.

I have the same issue.

After the game update is complete the launcher says Xmage requires an update. I update again and it continues to prompt me that there is still an update available. The game will not update the 1.4.15v3. It does this every time.

I tried following the steps that I found online like deleting my installed.properties file and now, in addition to the update bug, I get a prompt saying Xmage cannot be found when I start up the launcher.

Everything was fine before this update.

Running on Windows 10.

HALP!

I have the same exact problem. I cant successfully download the lastest version of Xmage and i cant open it, the console displays "Errore: impossibile trovare o caricare la classe principale mage.client.MageFrame
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=384m; support was removed in 8.0"
Sorry its Italian but its the same message of the OP above.
How can i fix this?

Exactly the same problem