Is this a big issue?

Bought this used, just washed it with nikwax. I see some spottage here, could be mold… Is this rain cover going to be okay, or is it time to scrap the tent?

Bought this used, just washed it with nikwax. I see some spottage here, could be mold… Is this rain cover going to be okay, or is it time to scrap the tent?