Why won't the dragon take my golden coin?

I'm at the point where I have the golden coin and have to give it to the dragon. The coin is already embossed but there is no possible interaction with the dragon.

According to the solutions I've found, this is supposed to be the next step. So did I miss something? How can I pass this passage? I haven't been able to find a savegame online that is after this step either.

Solution 1:

I found the solution, which is not quite obvious.

The short version, install the JaWooD Patch.

The long version, JaWooD once bought the distributionsrights, but wasn't authorized (german). However, they mixed a patched version with unpatched files, therefore such issues like mine described above happens. Luckily a patch exists.