Hi it is very possible the bitumen has an asbestos content(DO NOT SAND THE FLOOR. ASBESTOS IS REASONABLY SAFE UNLESS DISTURBED) but not all do you can buy a test on the Internet for about £50 if it came back positive you have two choices pay an asbestos removal firm to remove it or encapsulate it with expoxy resin (recommend a single coat of epoxy dpm resin) then prime and coat with self level ing screed. Both will be expensive but the latter a lot less. If no asbestos use ardex N/A leveling compound as its guaranteed to stick to bitumen
As your renting legally its your landlords problem

You should apply an appropriate liquid dpm, then apply a self levelling compound. If the house was built before 1970 it is almost guaranteed to have had asbestos based tiles

I would látex the floor first and than paint it ... wouldn’t try and sand it down in case asbestos is present.

Just to confirm what others have said.

Best to prime the floor and lay Ardex N/A or F Ball 1200 then put a vinyl or LVT down.

Depending on the age of the property and whether you are on the ground floor, then a liquid moisture suppressant might be needed (DPM).

I'm not sure how resin floors work but it is more than likely to need the above first regardless.

The cheapest option would be to put underlay and carpet down (glue down the grippers rather than any pinning).