Bevel troubleshooting

hi everyone,

below here i have created two objects but in the edit mode (same mesh but seperate objects) then i merged them. i merged the horizontal part with the vertical part. i am trying to bevel using ctrl B the highlighted edge. it wouldnt budge. have you any idea why? i tried to remove the bevel modifier or apply it but it wouldnt work

any idea please?

did u try merge by distance before beveling?

no i havent. i merged in center. ill try by distance and let you know

if this doesn’t help, pls provide blend file, then we can help you much better!

so i merged by distance and i was able to bevel my edge. but another issue came up. which could be a piece of cake for you but i cant seem to be able to wrap my head around.

below from ok angle

here from the back it apears to develop this protruding part and i cant fix it

can you help me with this?

so after posting i pushed it manually like this and added these edges to eliminate any ngons. what do you think?