Troubleshooting
Why Your Site Says Not Secure—and How to Fix It
Updated Sep 3, 2026
Fix
Diagnose the failure,
then fix it safely
Search errors, logs, and symptoms to get proven solutions. Follow step-by-step fixes, understand the cause, and verify with confidence.
Avoid pasting passwords, access tokens, private keys, or other secrets.
Start here — Get unstuck fast
I have an error messageSearch exact errors · 85My device is not workingHardware and driver issues · 5System is slow or laggingCPU, memory and I/O · 5Network / Wi-Fi issuesConnectivity problems · 6App / Service is crashingLogs and runtime failures · 2Kernel / Boot problemsBootloops, panic and init · 5
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How every Fix works
Identify the issue
Start with the exact error, log, or observable symptom.
Understand the cause
Connect evidence to known root causes before changing the system.
Apply the safest fix
Prefer reversible steps and clearly label destructive commands.
Verify and confirm
Run an explicit check and compare the expected result.
Existing library
Continue exploring
Linux Host, Ubuntu, SysAdmin
Read guide Fix: no permissions (user in plugdev group; are your udev rules wrong?)
Resolve 'no permissions (user in plugdev group; are your udev rules wrong?)' error on Linux by configuring /etc/udev/rules.d/51-android.rules.
Ubuntu Applications
Read guide Fix: Chrome Error "Something Went Wrong When Opening Your Profile" on Linux
Fix Chrome error 'Something went wrong when opening your profile' on Linux by removing SQLite lock files, fixing permissions, and restoring data.
Linux
Read guide Fix: error: package android.support.v7.app does not exist / AppCompatActivity cannot be resolved
Resolve 'error: package android.support.v7.app does not exist' and 'cannot resolve symbol AppCompatActivity' by migrating to AndroidX in Gradle.
Linux
Read guide Essential Open-Source Linux Tools for Systems Debugging & Performance Profiling
Master essential open-source Linux performance and debugging tools: strace, ltrace, perf, Valgrind, iostat, ss, and iperf3 with command workflows.
Linux Kernel
Read guide Fix Yocto QA Issue : “was already stripped, this will prevent future debugging !”
Fix Yocto BitBake build warning "QA Issue: binary was already stripped": configure INSANE_SKIP += "already-stripped" or prevent premature binary stripping.
Software Development
Read guide Fix ‘Indirection Requires Pointer Operand’ Error in C/C++ Programming
Fix C/C++ compiler error "indirection requires pointer operand": resolve dereference operator (*) usage on non-pointer variables and struct field access.
Software Development
Read guide Solved : Failure INSTALL_FAILED_SHARED_USER_INCOMPATIBLE “tried to change user”
Fix "INSTALL_FAILED_SHARED_USER_INCOMPATIBLE: tried to change user": resolve android:sharedUserId conflicts, sign app with platform keys, or uninstall.
Software Development
Read guide Solved: ServiceManager: Permission failure: android.permission.ACCESS_SURFACE_FLINGER
Fix "ServiceManager: Permission failure: android.permission.ACCESS_SURFACE_FLINGER": configure SELinux policy rules and system UID permissions in AOSP.
Linux
Read guide How to Audit & Fix Broken Links with LinkChecker
Find broken HTTP 404 links across websites using LinkChecker: crawl site internal links, generate HTML status reports, and prevent SEO traffic loss.
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