Problem description
After upgrading my Asus Zenfone Max Pro M1 (ASUS_X00TD) with the latest security fix (January 1, 2019), neither termux-open nor termux-share are able to exchange files with other applications.

The error message presented depending on application varies, but is usually along the lines "Error copying " (AquaMail) or "File could not be scheduled for upload" (Google drive).

An excerpt from "logcat -d" from after a termux-open invocation, full content in the attached "logcat.txt", logcat.txt

01-25 16:39:10.541 20935 20935 W ADebug : Failed to get property persist.sys.media.traces
01-25 16:39:10.571 20935 20935 D AndroidRuntime: >>>>>> START com.android.internal.os.RuntimeInit uid 10115 <<<<<<
01-25 16:39:10.709 20935 20935 I /system/bin/app_process: The ClassLoaderContext is a special shared library.
01-25 16:39:10.771 20935 20935 D AndroidRuntime: Calling main entry com.example.termuxam.Am
01-25 16:39:10.868 20935 20935 D AndroidRuntime: Shutting down VM
01-25 16:39:11.241 6257 8443 W ContentProvider: Normalized content://com.termux.files//data/data/com.termux/files/home/1548312079.png to content://com.termux.files/data/data/com.termux/files/home/1548312079.png to avoid possible security issues
01-25 16:39:11.254 6257 8443 W ContentProvider: Normalized content://com.termux.files//data/data/com.termux/files/home/1548312079.png to content://com.termux.files/data/data/com.termux/files/home/1548312079.png to avoid possible security issues
01-25 16:39:11.256 6257 8443 E DatabaseUtils: Writing exception to parcel
01-25 16:39:11.256 6257 8443 E DatabaseUtils: java.lang.SecurityException: Permission Denial: reading com.termux.app.TermuxOpenReceiver$ContentProvider uri content://com.termux.files/data/data/com.termux/files/home/1548312079.png from pid=19689, uid=10083 requires android.permission.permRead, or grantUriPermission()
01-25 16:39:11.256 6257 8443 E DatabaseUtils: at android.content.ContentProvider.enforceReadPermissionInner(ContentProvider.java:633)
01-25 16:39:11.256 6257 8443 E DatabaseUtils: at android.content.ContentProvider$Transport.enforceReadPermission(ContentProvider.java:503)
01-25 16:39:11.256 6257 8443 E DatabaseUtils: at android.content.ContentProvider$Transport.query(ContentProvider.java:214)
01-25 16:39:11.256 6257 8443 E DatabaseUtils: at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:102)
01-25 16:39:11.256 6257 8443 E DatabaseUtils: at android.os.Binder.execTransact(Binder.java:697)

Steps to reproduce

1. Verify that termux-open works as expected.
2. Upgrade Android 8.1 with said Android minor upgrade.
3. termux-open will now have stopped working.

Expected behavior
Unchanged behavior of termux-open and termux-share before and after the security upgrade. :)

Additional information
termux-info:
Updatable packages:
All packages up to date
System information:
Linux localhost 4.4.78-perf+ #1 SMP PREEMPT Tue Jan 8 13:27:12 CST 2019 aarch64 Android
Termux-packages arch:
aarch64
Android version:
8.1.0
Device manufacturer:
asus
Device model:
ASUS_X00TD

Steps attempted to rectify error condition

1. Turning off and on storage permission in the termux-app
2. Clearing the cache of the termux-app
3. Re-running termux-setup-storage
4. Clearing the cache of the termux-api
5. Removing and re-installing termux-api
6. pkg uninstall / install of termux-api

Happy to act as a guinea pig if I can contribute to solving this one!