Musestudio file cannot be download or edited by clicking edited on desktop by Musestudio

Musestudio had problem opened at the lower right corner and then now file cannot be download with bad gateway even though Musestudio work again by recovered to factory setting. I create a Forum topic before and waiting for reply.

Another problem again with clicking edited on desktop. see below error message.

Could anyone have new suggesstion? All problems happened from my Muse studio not working anymore.

Is it Musecore current version has problem and unstable? Can the problem be solved if a new updated version of Muse studio? I try to download a older version but cannot find it.

Is it Musecore website problem or caused by my Musestudio app have problem before.

Wishing someone can give me suggestion and solution.