expand exception catch for potcar library search

Author: esoteric-ephemera

pymatgen/io/validation/common.py

@@ -13,7 +13,7 @@
 from typing import TYPE_CHECKING, Any, Optional
 
 from pymatgen.core import Structure
-from pymatgen.io.vasp.inputs import POTCAR_STATS_PATH, Incar, Kpoints, Poscar, Potcar
+from pymatgen.io.vasp.inputs import POTCAR_STATS_PATH, Incar, Kpoints, Poscar, Potcar, PmgVaspPspDirError
 from pymatgen.io.vasp.outputs import Outcar, Vasprun
 from pymatgen.io.vasp.sets import VaspInputSet
 
@@ -187,7 +187,7 @@ def from_vasp_input_set(cls, vis: VaspInputSet) -> Self:
             potcar: list[PotcarSummaryStats] = PotcarSummaryStats.from_file(vis.potcar)
             potcar_functional = vis.potcar_functional
 
-        except FileNotFoundError:
+        except (FileNotFoundError, PmgVaspPspDirError):
             # Fall back to pregenerated POTCAR meta
             # Note that multiple POTCARs may use the same symbol / TITEL
             # within a given release of VASP.