An annoying gap in the floor, how to fix it?

[savio]

I have a wood veneer floor from the brand Golvabia throughout the apartment.
It's perfect everywhere except right outside a door where there is a gap of 3-4 mm.
It's visible and extremely annoying :S

How do I fix this?
One option, of course, is to remove the entire baseboard, adjust the plank, and then put the baseboard back again.
The downside of that is that I will likely cause damage to the baseboard, the wall, or both, which means painting, sealing, painting again, etc. (i.e., a lot of work).
Any other tips on how I can adjust the plank slightly? Any tool that could help me?

See attached images.
Image 1 is of the actual gap.
Image 2 is the gap from a bit further away, where you can see that the floorboard goes all the way to the wall (sorry for the blurry picture).

 

[Koste]

Either mix shavings of the floor material and wood glue, or fill with wood putty.

First, test
Screw a sturdy block and then either hit or pry with a crowbar against the wall into the gap if it's not a glued floor, and fill the holes from the screws which should be block + floor thickness.. long.

 

[para]

Try to kick it together
Just don't use shoes with soles that leave black marks

 

[savio]

Either mix shavings of the floor's material with wood glue, or fill with wood filler.

Test first
Attach a sturdy block and then hit or pry with a crowbar towards the wall into the gap if it's not a glued floor, and fill in the holes from the screws which should be block + floor thickness..long.

Sounds very advanced and like it could easily lead to damage and extra work.
It's a regular veneer floor, click floor in other words.

 

[savio]

Try to kick it together
Just don't use shoes with soles that leave black marks

Thanks for the tip, it wasn't more difficult than that.
I kicked barefoot and got some grip.
3 quick kicks and now it's spot on