Skills refusing to train

I have a new omega account that I have a multiple pilot training certificate for, so skills are training, but some skills refuse to train, and the issue is not because I don’t have previous skills or that I have too many skills training already. For example, I cannot train into any frigate types (gallente, amarr, minmatar, caldari) or lots of other random skills. The only way around this is if there is a skill later on (for example, blaster specialization) and I train that and it force trains hybrid weapons, even when I couldn’t train hybrid weapons before. This is hurting as the multiple training certificate only lasts 30 days and time is ticking for me to fix this issue

You can only train 50 skills at most