Editing APBS Electrostatics Plugin (section)

=== Incomplete Residues ===

Electrostatics should be analyzed on a complete molecule without missing
sidechains, and ideally without missing loops.
'''pdb2pqr''' will automatically model up to 10% of missing sidechain atoms.
If your structure is incomplete, consider creating a homology model first
using a tool of your choice (e.g. [https://salilab.org/modeller/ MODELLER]).

Some truncated PDB files include a single backbone atom of the next residue,
e.g. [https://www.rcsb.org/structure/2xwu 2xwu] chain B residue 954 atom N.
'''pdb2pqr''' reports:

<blockquote>
''Error encountered: Too few atoms present to reconstruct or cap residue LEU B 954 in structure!''
</blockquote>

The easiest solution is to remove that atom:

 remove /2xwu//B/954