I tried to insert a link inside a spoiler and now my signature and edit buttons are inside it
My page is: https://frentevermina.com/foro/
Please show the raw code of your post. It seems you've not closed the spoiler or the link closing tag is inserted wrongly. Make sure you have some space or line breaks before the closing [/spoiler] tag.
Here is the correct way (replace |...| to [...]):
|spoiler title="title"| https://example.com |/spoiler|