Featured Image function available randomly in Posts Settings Panel - Admin Area

Hello,

I have a problem with Featured Image Function. As visible in the screenshots, the Featured Image is no longer visible or active in Settings Panel "admin area" (as in my case, placed between Categories and Tags), also not active/visible in Preferences Panel. For this reason, my posts are not displayed properly in the website. The Featured image cannot be added anymore: https://ghiddetravelsidrumetii.ro

Thank you for the support,

Best regards,
Mira