Thanks for the info.
https://en.wikipedia.org/wiki/Riksdag
The Swedish parliament has 349 seats. You need 175 for a majority. The Left has 144, the center-Right coalition has 143, the nationalist Sweden Democrats have 62. The Right plus SD would be a majority of 206, except that the coalition’s two pro-immigrant “moderate” parties (Center with 31 seat and Liberals with 20 seats) refuse to be part of any coalition which gives SD’s power. But if one of the two “moderates” joins a coalition which includes the SDs, then that would be a majority.
I don’t see any way out which does not involve a new election.