I'm getting the exact same error when trying to upgrade my FC-6 FW from 1.11 to 1.12 (orig)- AxeFX3 (orig...not Mark II). I recently upgraded the AxeFxIII FW to the 23.00 series and noticed that there was odd things happening after upgrading to FW23.00 Beta 2 Public. I tried to upgrade the FC-6 to 1.12 and through Fractal Bot and got the same error where hundreds of dialog boxes appear and you have to use the task manager or end the process.
I rebooted, left it at FC-1.11 and was able to use both the FC and FW23.00 Beta 2 Public but had some lag in the FC-6 every now and then. Today I tried to update to FW23.00 Candidate 2 (beta 7) and the FC-6 would not work at all. So I tried installing FW 1.12 (original), directly downloaded from Fractal's web page and the multi-dialog error happened again (and again x3). Unplugged all, including FC, rebooted with Fas Link plugged in and tried it without Fas Link plugged in. The FC-6 was stuck on the ver. screen showing 1.11.
I just re-installed FW 23.00 Public and things seem to be working to where I can play and use the FC unit. There's is some lag in the FC unit, like I noticed back in when FW 23.00 was available. Right now I'm just happy that I can play. I was sweating bullets for a couple of hours thinking this would be a daylong, maybe month long trouble shooting effort.
I hesitated to post because usually someone has posted the same issue and it's resolved somewhere in the forum, if you bother to find it. If that's the case here, I apologize for not being able to find it. But this post that I quoted displayed the same problem I was seeing and the correspondence is relatively new.
I can live with 23.00 Public. I don't play live (much) and as far as I can tell it's functioning at a level that I can deal with. I would like to upgrade the FC-6 unit to the latest firmware. But I'm worried about attempting it. Right now I'm going to back up all (23.00 public, presets, global etc.) and hopefully play on while keeping an eye on this thread. Note: I have NOT done a full system hard reset. I'd be willing to do the full reset after I back up if the community/fractal team thinks that it would be beneficial or it would help troubleshooting since as far as I can tell
@visualsuplex and I appear to have the same error. I'm reluctant because I don't want to be without my Fractal. The wife is going out of town for a week and half. It is CRITICAL that I'm able to jam....lol.