diff --git a/src/app/compiler/compiler-sourceVerifier-fetchAndCompile.js b/src/app/compiler/compiler-sourceVerifier-fetchAndCompile.js
index d5a933cbbf..6a7dceaad3 100644
--- a/src/app/compiler/compiler-sourceVerifier-fetchAndCompile.js
+++ b/src/app/compiler/compiler-sourceVerifier-fetchAndCompile.js
@@ -75,8 +75,14 @@ export default class FetchAndCompile extends Plugin {
 
     let name = network.name.toLowerCase()
     name === 'main' ? 'mainnet' : name // source-verifier api expect "mainnet" and not "main"
-    await this.call('manager', 'activatePlugin', 'source-verification')
-    const data = await this.call('source-verification', 'fetch', contractAddress, name.toLowerCase())
+    let data
+    try {
+      data = await this.call('source-verification', 'fetch', contractAddress, name.toLowerCase())
+    } catch (e) {
+      setTimeout(_ => this.emit('sourceVerificationNotAvailable'), 0)
+      this.unresolvedAddresses.push(contractAddress)
+      return localCompilation()
+    }
     if (!data || !data.metadata) {
       setTimeout(_ => this.emit('notFound', contractAddress), 0)
       this.unresolvedAddresses.push(contractAddress)
diff --git a/src/app/tabs/debugger-tab.js b/src/app/tabs/debugger-tab.js
index f25b13e1c6..c5bccd87a6 100644
--- a/src/app/tabs/debugger-tab.js
+++ b/src/app/tabs/debugger-tab.js
@@ -50,11 +50,16 @@ class DebuggerTab extends ViewPlugin {
       toaster(yo`<div><b>Using compilation result from Solidity module</b></div>`)
     })
 
+    this.on('fetchAndCompile', 'sourceVerificationNotAvailable', () => {
+      toaster(yo`<div><b>Source verification plugin not activated or not available.</b> continuing <i>without</i> source code debugging.</div>`)
+    })
+
     this.debuggerUI = new DebuggerUI(
       this.el.querySelector('#debugger'),
       this.blockchain,
       adddress => this.call('fetchAndCompile', 'resolve', adddress, '.debug', this.blockchain.web3()))
 
+    this.call('manager', 'activatePlugin', 'source-verification')
     // this.call('manager', 'activatePlugin', 'udapp')
 
     return this.el
diff --git a/src/remixAppManager.js b/src/remixAppManager.js
index d94fd6b1dd..9d008ff582 100644
--- a/src/remixAppManager.js
+++ b/src/remixAppManager.js
@@ -15,7 +15,7 @@ export function isNative (name) {
 }
 
 export function canActivate (name) {
-  return ['manager'].includes(name)
+  return ['manager', 'debugger'].includes(name)
 }
 
 export class RemixAppManager extends PluginManager {