You can resolve common geometry issues using QGIS, a free open-source GIS software.
To do that, download and install QGIS.
After the installation, open QGIS and then drag and drop your geometry files to edit them.
For more information on how to use QGIS, see the QGIS documentation.
Check for duplicate vertices, sliver polygons, self-intersections, and holes using the following steps:
To enable the geometry checking tool, in the top navigation menu, click Plugins → Manage and Install Plugins. Search for Geometry Checker and select the checkbox. Click Close.
In the top navigation menu, click Vector → Check Geometries.
In Input vector layers, select your geometry file.
Check for not valid features as follows:
To check for self-intersections, in Geometry validity, select Self intersections.
To check for duplicate vertices, in Geometry validity, select Duplicate nodes.
To check for holes, in Geometry properties, select Polygons and multipolygons may not contain any holes.
To check for sliver polygons, in Geometry conditions, select No sliver polygons.
To modify your original geometry file, in Output vector layers, select Modify input layer.
Click Run to see the results of the geometry check.
If your geometry file has a polygon that exceeds the AOI size limitations, has a hole, has self-intersections, is a sliver polygon, or intersects an image footprint in more than one place, you can split the polygon using the following steps:
To enable editing, in the top navigation menu, click Layer → Toggle Editing.
In the top navigation menu, click Select Features and then select the polygon you want to split.
In the top navigation menu, click Edit → Edit Geometry → Split Features. Draw a line through the polygon, and right-click. This will split your polygon.
To modify your original geometry file, in the top navigation menu, click Layer → Toggle Editing and Save.