Better error handling

Show more common file content problems: Key and Value error
For all other error, report parsing error

account_statement_import_txt_xlsx/models/account_statement_import.py

@@ -4,6 +4,7 @@
 import logging
 
 from odoo import fields, models
+from odoo.exceptions import UserError
 
 _logger = logging.getLogger(__name__)
 
@@ -32,9 +33,15 @@ def _parse_file(self, data_file):
                 return Parser.parse(
                     data_file, self.sheet_mapping_id, self.statement_filename
                 )
-            except BaseException:
+            except KeyError as e:
+                e_str = f"Could not find value for {e.args[0]!r}"
+                raise UserError(f"Failed to parse uploaded file!\n{e_str}")
+            except ValueError as e:
+                e_str = f"Problem with a value in file\n{e}"
+                raise UserError(f"Failed to parse uploaded file!\n{e_str}")
+            except BaseException as e:
                 if self.env.context.get("account_statement_import_txt_xlsx_test"):
-                    raise
+                    raise UserError("Failed to parse uploaded file!")
                 _logger.warning("Sheet parser error", exc_info=True)
         return super()._parse_file(data_file)