Repository https://jcenter.bintray.com does not work!
There is an android issue around RN-Fetch-Blob happened suddenly.
- "rn-fetch-blob": "^0.12.0",
FAILURE: Build failed with an exception.
> :rn-fetch-blob > Resolve dependencies of :rn-fetch-blob:classpath
* What went wrong:
A problem occurred configuring project ':rn-fetch-blob'.
> Could not resolve all artifacts for configuration ':rn-fetch-blob:classpath'.
> Could not resolve com.android.tools.build:apksig:3.2.1.
Required by:
project :rn-fetch-blob > com.android.tools.build:gradle:3.2.1 > com.android.tools.build:builder:3.2.1
project :rn-fetch-blob > com.android.tools.build:gradle:3.2.1 > com.android.tools.build:builder:3.2.1 > com.android.tools.build:apkzlib:3.2.1
> Could not resolve com.android.tools.build:apksig:3.2.1.
> Could not get resource 'https://jcenter.bintray.com/com/android/tools/build/apksig/3.2.1/apksig-3.2.1.pom'.
> Could not HEAD 'https://jcenter.bintray.com/com/android/tools/build/apksig/3.2.1/apksig-3.2.1.pom'.
> Read timed out
Android build works well by replacing repositories property in a file node_modules/rn-fetch-blob/android/build.gradle
It works on my side
repositories {
mavenLocal()
google()
// jcenter()
mavenCentral()
maven { url "http://maven.google.com" }//Required for crashlytics
maven { url "https://jitpack.io" }
}
Hi! This is also happening to me... Any solutions? It started to happen suddenly too. Thanks!

i tried the solution from areebshakeel https://github.com/joltup/rn-fetch-blob/issues/820
replace the jcenter() with mavenCentral() and add configurations
allprojects {
repositories {
...
mavenCentral()
configurations.all {
resolutionStrategy {
// versions used by 0.67
force 'com.squareup.okhttp3:okhttp:3.11.0'
force 'com.facebook.yoga:proguard-annotations:1.19.0'
force 'com.facebook.fbjni:fbjni-java-only:0.2.2'
force 'com.facebook.flipper:flipper:0.99.0'
force 'com.facebook.flipper:flipper-network-plugin:0.99.0'
force 'com.facebook.flipper:flipper-fresco-plugin:0.99.0'
}
}
}
}
i need to add this configuration because my project using 0.63 not 0.65+
it's important to fix it in rn-fetch-blob and release another version because jcenter won't be available anymore.
I'll try to do it.
Just wanted to say that jcenter gradle repository looks like it's good now. Right now I generated a release and everything works correctly :)
I didn't change anything...

Just switch to https://www.npmjs.com/package/react-native-blob-util Shouldn't be any issue there
I work this added maven { url "https://maven.google.com" } with letter "s" in https