Could not open project error

Hello everyone,
recently i’ve run into some issues with reopening projects. I created new function block and tried to initialize it in the code. For some reason PLCnext did not see the new type of block so i saved project and tried to reopen it. After i closed it, i got Error „Could not open project“. I have lost almost two days of work. Next day i tried to recreate the project but after doing 1/4 of it i got the same issue again. Does someone know any solution ? Is it possible to retrieve the lost data ?
Regards

The project has been recovered and sent via email.

Hello,
I have same problem as Krz_Pigon. Could You help me too?
Regards,

Hi kuba245, we will need to get your PLCnext Engineer project. Someone will contact you with instructions on where to send it.
(ref: #234176)