Unofficial Skyrim Special Edition Patch

The civil war questline for the imperial faction is currently uncompletable, after delivering the forged documents and conquering the fort in the pale, you will be sent to the rift. Here you should be sent to report in with legate rikke, however this dialog option will never appear (or at least never has for me, on multiple characters) afterwards you would be sent to blackmail the riften steward, rob a stormcloak supply wagon, and take the for in the rift for the imperials. But unless the game spontaneously doesn't shit the bed, you can't even make it three missions in.