As someone who bought CoreUI, hopefully this isn't it. Nearly non-existent support despite a paid support tier, dead forums, straight up broken components with the justification being "I'm fixing it in 4.0, ETA is 6-12 months." I'm sorry but if your production build is broken, "I'm fixing it next year" is a completely unacceptable response.
I'm sorry for the inconvenience, can you send me our support reply to lukasz (at) coreui.io, I will check want went wrong because ETA is 6-12 months is not possible for bug reports.