1) I tried to define a custom CRS in QGIS without success. I fill all fields and try to change project CRS. (all parameters is good) But I can't find custom CRS in list. I think that this is due to this error.
2) This window opens at startup of the program. I tried to install all versions of QGIS from 2.6 to 2.18 and this error didn't disappear. What am I doing wrong?
When I try to change the project CRC I can't find it in list.