I downloaded the XAPK from Apkcombo, and with ZArchiver, I extracted it to a folder with the same name as the file.
I opened the extracted folder and copied the OBB file twice.
In the first instance, I simply copied the OBB file. In the second, I copied the "com.carx..." folder, and in both cases I replaced the old files and checked if the numbering/update was correct.
I believe it might be a problem with the X6 and this update, because it happened to me and my friend. We didn't update or change anything on our phones. But even so, this specific version isn't working for us.
Is there anything we can do to fix or at least decipher the problem?